File html.php

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<?php

namespace SIW;

use SIW\Elements;

/**
 * Hulpfuncties voor het genereren van HTML
 *
 * @copyright 2019 SIW Internationale Vrijwilligersprojecten
 * @since     3.0.0
 */
class HTML {

    /**
     * Rendert html-tag
     *
     * @param string $type
     * @param array $attributes
     * @return string
     */
    public static function render_tag( string $type, array $attributes, $content = null, $close = false ) {
        echo self::generate_tag( $type, $attributes, $content, $close );
    }

    /**
     * Genereert html-tag
     *
     * @param string $type
     * @param array $attributes
     * @return string
     */
    public static function generate_tag( string $type, array $attributes, $content = null, $close = false ) {
        $tag = sprintf(
            '<%s %s>',
            tag_escape( $type ),
            self::generate_attributes( $attributes )
        );
        if ( null !== $content ) {
            $tag .= $content;
        }

        if ( true === $close ) {
            $tag .= sprintf( '</%s>', tag_escape( $type ) );
        }

        return $tag;
    }

    /**
     * Genereert tabel
     *
     * @param array $rows
     * @param array $headers
     * @param array $attributes
     * 
     * @return string
     */
    public static function generate_table( array $rows, array $headers = [], $attributes = [] ) {

        $table = sprintf( '<table %s>', self::generate_attributes( $attributes ) );
        if ( ! empty( $headers ) ) {
            $table .= '<tr>';
            foreach ( $headers as $header ) {
                $table .= '<th>' . wp_kses_post( $header ) . '</th>';
            }
            $table .= '</tr>';
        }

        foreach ( $rows as $row ) {
            $table .= '<tr>';
            foreach ( $row as $cell ) {
                $table .= '<td>' . wp_kses_post( $cell ) . '</td>';
            }
            $table .= '</tr>';
        }
        $table .= '</table>';

        return $table;
    }

    /**
     * Genereert een `<ol>` of `<ul>` lijst van array
     * @param array $items
     * @param bool $ordered
     *
     * @return string
     *
     * @todo escaping + generate_tag gebruiken + attributes
     */
    public static function generate_list( $items, bool $ordered = false ) {
        if ( ! is_array( $items ) || empty ( $items ) ) {
            return false;
        }
        $tag = $ordered ? 'ol' : 'ul';

        $list = "<{$tag}>";
        foreach ( $items as $item ) {
            $list .= '<li>' . wp_kses_post( $item ) . '</li>';
        }
        $list .= "</{$tag}>";

        return $list;
    }

    /**
     * Genereert link
     *
     * @todo attributes, target en rel
     *
     * @param string $url
     * @param string $text
     * @param array $attributes
     * @param array $icon
     * @return string
     */
    public static function generate_link( $url, $text = null, array $attributes = [], array $icon = [] ) {

        if ( null === $text ) {
            $text = $url;
        }

        if ( ! empty( $icon ) ) {
            $icon = wp_parse_args(
                $icon,
                [
                    'class'      => '',
                    'size'       => 2,
                    'background' => 'none',
                ]
            );
            $icon_html = Elements::generate_icon( $icon['class'], $icon['size'], $icon['background'] );
        }
        else { 
            $icon_html = '';
        }

        $link = sprintf(
            '<a href="%s" %s>%s</a>',
            esc_url( $url ),
            self::generate_attributes( $attributes ),
            wp_kses_post( $text ) . $icon_html
        );
        return $link;
    }

    /**
     * Genereert externe link
     *
     * @param  string $url
     * @param  string $text
     * @return string
     */
    public static function generate_external_link( string $url, string $text = null ) {
        return self::generate_link(
            $url,
            $text . '&nbsp;',
            [
                'target'           => '_blank',
                'rel'              => 'noopener external',
                'data-ga-track'    => 1,
                'data-ga-type'     => 'event',
                'data-ga-category' => 'Externe link',
                'data-ga-action'   => 'Klikken',
                'data-ga-label'    => $url,
            ],
            [
                'class'      => 'siw-icon-external-link-alt',
            ]
        );
    }

    /**
    * sanitize_html_class voor meerdere classes
    *
    * @param  mixed $class
    * @param  string $fallback
    * @return string
    */
    public static function sanitize_html_classes( $class, $fallback = null ) {
        if ( is_string( $class ) ) {
            $class = explode( ' ', $class );
        }
        if ( is_array( $class ) && count( $class ) > 0 ) {
            $class = array_map( 'sanitize_html_class', $class );
            return implode( ' ', $class );
        }
        else {
            return sanitize_html_class( $class, $fallback );
        }
    }

    /**
     * Genereert attributes op basis van array
     *
     * @param array $attributes
     * @return string
     */
    public static function generate_attributes( array $attributes ) {
        $rendered_attributes = '';
        foreach ( $attributes as $key => $value ) {
            if ( false == $value ) {
                continue;
            }
            if ( 'class' == $key ) {
                $value = self::sanitize_html_classes( $value );
            }
            if ( is_array( $value ) ) {
                $value = json_encode( $value );
            }

            $rendered_attributes .= sprintf( true === $value ? ' %s' : ' %s="%s"', $key, esc_attr( $value ) );
        }
        return $rendered_attributes;
    }

    /**
     * Genereert form field
     *
     * @param string $type
     * @param array $input_args
     * @param array $wrapper_args
     * @return string
     */
    public static function generate_field( string $type, array $input_args, array $wrapper_args = [] ) {

        $input_args = wp_parse_args( $input_args, [
            'id'          => '',
            'name'        => '',
            'value'       => '',
            'options'     => [],
            'placeholder' => '',
            'pattern'     => '',
            'class'       => '',
            'disabled'    => false,
            'required'    => false,
            'attributes'  => [],
            'options'     => [],
        ]);

        $attributes = wp_parse_args( $input_args['attributes'], [
            'disabled'    => $input_args['disabled'],
            'required'    => $input_args['required'],
            'class'       => $input_args['class'],
            'id'          => $input_args['id'],
            'name'        => $input_args['name'],
            'value'       => $input_args['value'],
            'placeholder' => $input_args['placeholder'],
        ]);

        $field = '';

        if ( ! empty( $input_args['label'] ) ) {
            $field .= sprintf( '<label for="%s">%s</label>', esc_attr( $input_args['id'] ), esc_html( $input_args['label'] ) );
        }

        switch ( $type ) {
            case 'text':
            case 'tel':
            case 'email':
            case 'url':
            case 'number':
            case 'hidden':
            case 'date':
            case 'submit':
                $field .= sprintf('<input type="%s" %s>', esc_attr( $type ), self::generate_attributes( $attributes ) );
                break;
            case 'radio':
                $options = $input_args['options'];
                $value = $attributes['value'];
                if ( ! empty( $options ) && is_array( $options ) ) {
                    foreach ( $options as $key => $option ) {
                        $checked = checked( $value, $key, false );
                        $field .= sprintf( '<label><input type="radio" value="%s" %s %s>%s</label>', esc_attr( $key ), self::generate_attributes( $attributes ), $checked, esc_html( $option ) );
                    }
                }
                break;

            case 'select':
                $options = $input_args['options'];
    
                $field .= sprintf( '<select %s>', self::generate_attributes( $attributes ) );
                if ( ! empty( $options ) && is_array( $options ) ) {
                    foreach ( $options as $key => $option ) {
                        $selected = selected( $attributes['value'], $key, false );
                        $field .= sprintf('<option value="%s" %s>%s</option>', esc_attr( $key ), $selected, esc_html( $option ) );
                    }
                }
                $field .= '</select>';
                break;

            case 'checkbox':
                $value = $attributes['value'];
                unset( $attributes['value'] );
                $field .= sprintf( '<label for="%s">', esc_attr( $attributes['id'] ) );
                $field .= sprintf( '<input type="checkbox" %s %s/>', self::generate_attributes( $attributes ), checked( 1, $value, false ) );
                $field .= sprintf( '%s</label>', esc_html( $input_args['label'] ) );
                break;

            case 'textarea':
                $value = $attributes['value'];
                unset( $attributes['value'] );
                $field .= sprintf( '<textarea %s>%s</textarea>', self::generate_attributes( $attributes ), $value );
                break;

            default:
                return false;
        }

        /* Wrapper toevoegen */
        $wrapper_args = wp_parse_args( $wrapper_args, [
            'tag'   => '',
            'class' => [],
            ]
        );

        if ( ! empty( $wrapper_args['tag'] ) ) {
            $wrapper_class = '';
            if ( ! empty( $wrapper_args['class'] ) ) {
                $wrapper_class = sprintf( 'class="%s"', self::sanitize_html_classes( $wrapper_args['class'] ) );
            }

            $wrapper_open = sprintf( '<%s %s>', tag_escape( $wrapper_args['tag'] ), $wrapper_class );
            $wrapper_close = sprintf( '</%s>', tag_escape( $wrapper_args['tag'] ) );

            $field = $wrapper_open . $field . $wrapper_close;
        }

        return $field;
    }

}

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